UNIT 3 REVIEW TEST HVAC
QUESTIONS AND 100% CORRECT
ANSWERS GRADED A+ 2025-2026
EDITION.
Ice melts in ice boxes because
a. heat flows through the insulated walls.
b. heat flows through the doorway when it is opened.
c. heat is moved into the box when warm food is placed in it.
d. All of the above. - Answer D
High-temperature refrigeration is that produced by
a. heat from a furnace.
b. an air-conditioning system,
c. the vegetable cooling system of a refrigerator.
d. the freezer section of a refrigerator. - Answer B
A ton of refrigeration is equal to
a. 1 ton of Ice.
b. 288,000 Btu/24 h.
c. 144 Btu/h.
d. a large refrigerator. - Answer B
The evaporator in a refrigeration system
a. meters the refrigerant.
b. condenses the refrigerant.
c. is the component where refrigerant boils and absorbs heat.
d. compresses the vaporized refrigerant. - Answer C
The compressor in a refrigeration system
a. compresses the refrigerant.
, The condenser
a. rejects the heat from the refrigerant.
b. meters the refrigerant throughout the system.
c. causes super-heat in-the refrigerant.
d. All of the above. - Answer A
Reciprocating compressors have
a. a piston and a cylinder.
b. two scrolls that mesh together.
c. a rotor to compress the refrigerant.
d. a large fan-type compressor component. - Answer A
R-22 is a refrigerant most commonly used in _________ systems.
a. residential air-conditioning
b. light commercial refrigeration
c. industrial refrigeration
d. household refrigeration - Answer A
R-134a is a refrigerant most commonly used in ________ systems.
a. medium-temperature
b. residential air-conditioning
c. primarily low-temperature
d. All of the above. - Answer A
The cylinder color code for R-410A is
a. rose.
b. white.
c. yellow.
d. green. - Answer A
QUESTIONS AND 100% CORRECT
ANSWERS GRADED A+ 2025-2026
EDITION.
Ice melts in ice boxes because
a. heat flows through the insulated walls.
b. heat flows through the doorway when it is opened.
c. heat is moved into the box when warm food is placed in it.
d. All of the above. - Answer D
High-temperature refrigeration is that produced by
a. heat from a furnace.
b. an air-conditioning system,
c. the vegetable cooling system of a refrigerator.
d. the freezer section of a refrigerator. - Answer B
A ton of refrigeration is equal to
a. 1 ton of Ice.
b. 288,000 Btu/24 h.
c. 144 Btu/h.
d. a large refrigerator. - Answer B
The evaporator in a refrigeration system
a. meters the refrigerant.
b. condenses the refrigerant.
c. is the component where refrigerant boils and absorbs heat.
d. compresses the vaporized refrigerant. - Answer C
The compressor in a refrigeration system
a. compresses the refrigerant.
, The condenser
a. rejects the heat from the refrigerant.
b. meters the refrigerant throughout the system.
c. causes super-heat in-the refrigerant.
d. All of the above. - Answer A
Reciprocating compressors have
a. a piston and a cylinder.
b. two scrolls that mesh together.
c. a rotor to compress the refrigerant.
d. a large fan-type compressor component. - Answer A
R-22 is a refrigerant most commonly used in _________ systems.
a. residential air-conditioning
b. light commercial refrigeration
c. industrial refrigeration
d. household refrigeration - Answer A
R-134a is a refrigerant most commonly used in ________ systems.
a. medium-temperature
b. residential air-conditioning
c. primarily low-temperature
d. All of the above. - Answer A
The cylinder color code for R-410A is
a. rose.
b. white.
c. yellow.
d. green. - Answer A
